/*
 * service_patterns.h — Allowlists for HTTP clients, async dispatch, and config accessors.
 *
 * Used during call resolution to classify CALLS edges as:
 *   HTTP_CALLS  — synchronous HTTP client calls
 *   ASYNC_CALLS — async message/task dispatch
 *   CONFIGURES  — config/env access
 *
 * Lookup is O(1) via hash table initialized once at startup.
 */
#ifndef CBM_SERVICE_PATTERNS_H
#define CBM_SERVICE_PATTERNS_H

#include <stdbool.h>
#include <stddef.h>

/* Edge type returned by pattern match. */
typedef enum {
    CBM_SVC_NONE = 0,      /* Not a service pattern — use normal CALLS */
    CBM_SVC_HTTP = 1,      /* Synchronous HTTP client call */
    CBM_SVC_ASYNC = 2,     /* Async dispatch (message broker, task queue) */
    CBM_SVC_CONFIG = 3,    /* Config/env accessor */
    CBM_SVC_ROUTE_REG = 4, /* Route registration (router.GET, app.get, Route::post) */
    CBM_SVC_GRPC = 5,      /* gRPC client call (protobuf stub invocation) */
    CBM_SVC_GRAPHQL = 6,   /* GraphQL client query/mutation */
    CBM_SVC_TRPC = 7,      /* tRPC client procedure call */
} cbm_svc_kind_t;

/* Initialize the pattern lookup tables. Call once at startup. Thread-safe after init. */
void cbm_service_patterns_init(void);

/* Check if a resolved QN contains a known service library identifier.
 * Returns the pattern kind, or CBM_SVC_NONE if no match.
 * Matches on library name substrings in the QN (e.g., "requests" in
 * "project.venv.requests.api.get"). Import-alias transparent. */
cbm_svc_kind_t cbm_service_pattern_match(const char *resolved_qn);

/* True for a bare, unqualified call to the native `fetch()` API. Deliberately
 * NOT part of the substring tables above: those are matched unconditionally
 * against the raw callee name before/regardless of registry resolution
 * (the #523 external-library bypass), and "fetch" — unlike "axios" or
 * "requests" — collides with a plausible local identifier. Callers must
 * only consult this after registry resolution has come back empty, so a
 * locally resolvable `function fetch(){}` / `const fetch = () => {}` is
 * classified via its real resolved QN instead and never reaches this check. */
bool cbm_service_pattern_is_global_fetch(const char *callee_name);

/* True when a string literal is a plausible HTTP route for the given callee.
 * Rejects filesystem paths and non-HTTP string consumers. */
bool cbm_service_pattern_is_http_route_literal(const char *literal, const char *callee_name);

/* True when a JS/TS-family call is client-side navigation rather than a
 * network request (#1250): Angular Router.navigate/navigateByUrl, Ionic navigation, Nuxt
 * navigateTo, react-router navigate, router/history push|replace|prefetch,
 * History pushState/replaceState, Location go|assign|replace, bare goto /
 * redirect / permanentRedirect. Its slash-prefixed argument is a client route,
 * so it must not mint an arg_url HTTP_CALLS edge. js_family is the caller's
 * FILE-language gate: false always returns false, so no other language's
 * recall is traded (suppressors stay per-language). */
bool cbm_service_pattern_is_client_navigation(bool js_family, const char *callee_name);

/* True when text that reached a path slot is a source comment rather than a
 * path: a block comment (slash-star … star-slash), a line comment (slash-slash
 * followed by a space), or any text with a line break. The wildcard route
 * (slash-star alone) is a path. */
bool cbm_service_pattern_is_comment_text(const char *text);

/* Per-worker TLS cache for cbm_service_pattern_match results. The
 * pattern matcher runs once per resolved CALL edge in emit_service_
 * edge — that's 6 pattern lists × ~30 patterns × strstr per call ≈
 * ~180 strstrs per call. The same resolved QN repeats across most of
 * the call edges in a project (e.g. "fmt.Errorf"), so caching turns
 * a linear pattern-list scan into one hash lookup. Call _begin once
 * per worker thread before the resolve loop and _end at the end. */
void cbm_service_pattern_cache_begin(void);
void cbm_service_pattern_cache_end(void);

/* Get the HTTP method from the callee name suffix (e.g., ".get" → "GET").
 * Returns NULL if method cannot be inferred. */
const char *cbm_service_pattern_http_method(const char *callee_name);

/* Get the HTTP method from a route registration callee name suffix
 * (e.g., "router.GET" → "GET", "app.post" → "POST").
 * Returns NULL if not a known route registration method. */
const char *cbm_service_pattern_route_method(const char *callee_name);

/* Go 1.22+ net/http ServeMux pattern "[METHOD ][HOST]/[PATH]" (#2537):
 * "POST /v1/x", "GET api.example.com/v1/x", "api.example.com/v1/x". Returns a
 * pointer to PATH's leading slash inside `pattern`, or NULL when the pattern
 * names neither a method nor a host before a slash (a plain "/v1/x" is NULL
 * too: there is nothing to split). METHOD is a run of uppercase letters ended
 * by spaces or tabs; it is copied to `method` (NUL-terminated, "" when the
 * pattern names none) when `method` is non-NULL; a method that does not fit
 * `method_sz` then makes the pattern NULL. The grammar is Go's: callers gate
 * on the file language. */
const char *cbm_service_pattern_mux_split(const char *pattern, char *method, size_t method_sz);

/* The path of a ServeMux registration's pattern (#2537): only a callee ending
 * ".Handle" or ".HandleFunc" registers one, and never with a URL ("://").
 * Another route-verb call names no pattern: `store.Get("users/123")` is no
 * host "users" + path "/123", `client.Get("https://...")` no host "https:".
 * The split of cbm_service_pattern_mux_split for such a registration, else
 * NULL. The grammar is Go's: callers gate on the file language. */
const char *cbm_service_pattern_mux_route_path(const char *callee_name, const char *pattern);

/* Get the broker name for an async QN (e.g., "pubsub" from a Pub/Sub QN).
 * Returns NULL if not an async pattern. */
const char *cbm_service_pattern_broker(const char *resolved_qn);

/* GraphQL operation identity of a client call argument (#598).
 * Scans `doc` as a GraphQL document (skipping comments, strings, `${...}`
 * template interpolations and leading fragment definitions) and reports the
 * first operation: *op_type is "query", "mutation" or "subscription" ("query"
 * for the `{ ... }` shorthand). Returns true and writes the operation name to
 * name_buf when the operation is named. Returns false for an anonymous
 * operation, or with *op_type = "operation" when `doc` is not a GraphQL
 * document (NULL, a URL, a bare word such as a dict key ...). The operation
 * text itself is never copied, so callers can key Routes on a bounded
 * identity. */
bool cbm_service_pattern_graphql_operation(const char *doc, const char **op_type, char *name_buf,
                                           size_t name_sz);

#endif /* CBM_SERVICE_PATTERNS_H */